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https://issues.apache.org/jira/browse/AVRO-1055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thiruvalluvan M. G. updated AVRO-1055:
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Attachment: AVRO-1055.patch
This patch solves the problem by making the FP table a static array and
initializing it in a static block. Java ensures that nobody is able to access
the table until it is fully initialized.
By making it a static member of an inner static class rather than
SchemaNormalization class itself, we ensure that the Table is initialized only
when it is required. (the class loader will load the inner class only when the
table is accessed for the first time)
> Race condition in Java fingerprinting code
> ------------------------------------------
>
> Key: AVRO-1055
> URL: https://issues.apache.org/jira/browse/AVRO-1055
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.7.0
> Reporter: Thiruvalluvan M. G.
> Assignee: Thiruvalluvan M. G.
> Priority: Minor
> Attachments: AVRO-1055.patch
>
>
> There is a subtle race condition. If the fpTable64 is not yet initialized and
> two thread try to compute FP for two schemas (or the same schema) at the same
> time, one thread will start initializing the table while the other can start
> using the partially initialized table giving wrong result.
> The forthcoming patch fixes that issue
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